R-squared analysis of scatter plot resulting in NaN

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Aine
Aine 2022-8-7
编辑： dpb 2022-8-7
Hi there,
I have two variables (eP and T) each of which are 1x 1244 in size. I have created a scatter plot of eP against T and I have fit a line. However, both variables have some NaN values. When I do an r-squared test I get an R squared value of NaN. Does anyone know how to perform an r-squared test and ignore NaN values?

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dpb
dpb 2022-8-7
编辑：dpb 2022-8-7
'Pends on how you did it -- show your code for exact answer to that direction, but --
If you have the Statistics TB, then use
mdl=fitlm(x,y,'linear'); % will ignore NaN automagically
rsqO=mdl.Rsquared.Ordinary; % ordinary r-squared
rsqA=mdl.Rsquared.Adjusted; % adjusted r-squared
will handle it transparently.
Otherwise,
isOK=all(isfinite([ep T]),2); % indices of those with NaN in neither variable
use ep(isOK), T(isOK) in your other code.

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